I visited a gloryhole for the first time last week. I was not very experienced as I have only sucked off a few shemale escorts before, and they usually don't cum because of hormonal treatments. But I was quite curious after reading about them on the web. I chose 11:30 on a holiday Friday in a sex shop. When I got there, there were a number of cars in the lot and there was no one in the store area. I bought some tokens and went into the video area were several guys loitering and selected a booth in the back with a hole to the adjoining booth. It was relatively clean with a bench. The hole was small, about 3 inches in diameter and slightly low for me. But I could access it if I kneeled (and why not, cocksucking is a very submissive activity).
I put some tokens in the video and waited. I didn't have too long to wait before a guy entered the booth next to me. He sat down and started watching a video and I waited. Pretty soon I saw a finger come through the hole and I responded with my finger indicating that I wanted to suck. I heard him stand up and in a few seconds I saw in the dim light a cock come through the hole. It was rather short, flaccid and circumcised and looked clean. I knelt in front of the hole and started licking the head. The cock immediately responded by stiffening and I took it into my mouth. It was short and very thick. I had to open my mouth wide to get it in and keep my teeth out of the way. After a few minutes the guy asked me if I wanted him to come into my booth, but I indicated that I wanted to keep the experience anonymous. I sucked gently, bobbed my head up and down, and worked my tongue on the underside of his cock. Occasionally he made fucking thrusts with his hips but mostly just pressed his pelvis against the hole. After a few minutes his breathing got heavier and he gasped softly "Don't stop! Don't stop!" I increased the vigor of my sucking and was quickly rewarded by a flood of semen on my tongue. It is curious that I didn't feel it spurting against the back of my mouth or anything like that, in fact none of the cocks that came in my mouth felt like that. What I did feel was the increasing wetness in my mouth and the slightly salty, bitter taste of his cum. After I swallowed his load I noticed a bit of an aftertaste. It was not an unpleasant sensation.
After the guy recovered a bit his fingers came through the hole indicating that he wanted my cock. It was a bit awkward because I am tall and the hole was low but I got my cock through the hole by spreading my legs. He fingered me for a minute and then changed his mind and left the booth. I have a birthmark on my dick and maybe he didn't like that. That was OK because I was mainly there to suck, not be sucked.